4.. 建筑构件

The category of construction components comprises all construction parts that physically exist in the fields of structural and civil engineering, for instance, struts, walls, ceilings. This includes all objects related to the shell of the building as well as additional doors, windows, roof tiles. The relatively long lifetime spanning several years or even decades is typical of this category. Furthermore, these objects are usually not power-driven (which differentiates them from the category of technical components).